Harness stop motion device for a loom



April 12, 1960 J. R. MAY 2,932,326

HARNESS STOP MOTION DEVICE FOR A LOOM Filed July 20, 1956 2 Sheets-Sheet l Fae-.1-

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INVENTOR. JOSEPH 2.. MAY

ATTOIZHEYS April 12, 1960 J. R. MAY 2,932,326

' HARNESS STOP MOTION DEVICE FOR A LOOM Filed July 20, 1956 2 Sheets-Sheet 2 L!) E w in m N f (n 1 q "l g d a H J P1 4 INVENTOR. JosEDH \2 MAY vgm 6 Unit miles Paten HARNESS STOP MOTION DEVICE FOR A LOOM Joseph R. May, Franklinton, N.C., assignor to Lewis Jackson Peoples, Louisburg, N.C.

Application Juiy 20, 1956, Serial No. 599,081

3 Claims. (Cl. 139-337) The presenttinvention relates to anelectrically controlled stop motion device for attachment to a loom.

An object of the present invention is to provide an electrically controlled device for arresting the operation of a loom if one or more of the harness frames drops due to slackness or to a break in the harness strap.

Another object of the present invention is to provide a control switch for a loom which is normally free from contact with the loom harness suspension means, eliminating wear due to frictional engagement with the harness frames. v

A further object of the present invention is to provide a harness stop motion device for a loomwhich is simple in structure, one easily installed and serviced, one which is virtually free of wear or damage, and one which is almost totally enclosed, eliminating any danger from sparking.

These and other objects and advantages of the present invention will be fully apparent from the following description when taken in connection with the annexed drawings, in which:

Figure 1 is a fragmentary perspective view of a loom showing the harness stop motion device of the present invention installed thereon;

Figure 2 is a sectional view, on an enlarged scale, taken on the line 2-2 of Figure 1;

Figure 3 is a perspective view of the device of the present invention removed from the loom;

Figure 4 is a sectional view taken on the line 4-4 of Figure 3, and on an enlarged scale; I

Figure 5 is a sectional fragmentary view taken on the line 5-5 of Figure 4, and on an enlarged scale;

Figure 6 is a sectional view on an enlarged scale, taken on the line 6-6 of Figure 4.

Referring in greater detail to the drawings in which like numerals indicate like parts throughout the several views, the harness stop motion device of the present invention is for use with a loom frame designated generally by the reference numeral 10 having a horizontally disposed jack stick 11 connected to the loom frame 10 for up and down movement and an upstanding harness frame 12 positioned above and spaced from the jack stick 11 and connected to the jack stick 11 for movement with the latter.

The loom frame 10 includes an arched frame 13 on which is mounted a harness roll shaft 14 having adjacent each end the harness rolls 15 and 16. The loom frame 10 includes side pieces 17 and 18, frame base elements 19 and 21, and longitudinal frame elements 22 and 23. The jack stick 11 is connected to the harness frame 12 by means of jack books 24, the harness frame 12 supporting the heddles 25 in a conventional manner.

The harness stop motion deviceof the present invention comprises a horizontally disposed member 26 of inverted U-shaped configuration for most of its length but having solid ends 27 and 28, as seen clearly in Figures 4 to 6, inclusive. The member 26 is positioned 2,932,326 Patented Apr. 12, 1960 ness frame 12 so that a portion of it is directly below the harness frame 12 and is fixedly supported on the loom frame 10 by means of telescoping brackets 29 and 31, the lower one 29 being fixedly secured by riveting or other means to the frame base element 19. Another member 32 is similarly supported upon the frame base element 21 and is of identical configuration and structure. It is to be understood that the description of the member 26 applies equally to the member 32. t ',The member 26 includes a fixed contact element 33,

also of U-shaped configuration, as seen most clearly'in Figure 6, andfixedly supported upon the upper end-of the bracket 31 by means of a saddle 34. The member 26 is fabricated of a nonconducting material such as wood or plastic and a metallic element or.strip 35 is fastened to the underside of the member 26 intermediate the ends thereof by means of bolts 36 and 37, each of which have countersunk heads received in countersunk holes in the member 26.

The bolts 36 and 37 extend downwardly within the member 26 and constitutes movable contactelements. arranged in superimposed spaced relation with respect to' the fixed contact element 33. Means is providedconnecting the member 26 to the fixed contact 33 for movement of the bolts 36 and 37 into and out of engagement with the fixed contact 33. Specifically, this means includes other countersunk bolts 38 and 39 extending loosely through the fixed contact elements 33 and having their heads received in countersunk holes provided in the member 26. i

Means is provided for biasing the member 26 away from the fixed contact element .33. Specifically, this means includes a coiled spring 41 surrounding the bolt 38 and another coiled spring 42 surrounding the bolt 39. The ends of the coiled springs 41 and 42 bear against the fixed contact element 33 and the underside of the member 26. 'It is noted that the bolts 38 and 39 having the coiled springs 41 and 42 operatively connected thereto constitute spring biased bolt means connecting the member 26 to the fixed contact element 33.

A wire 43 connects the strip 35 electrically with a switch (not shown) in the electrical circuit which drives the loom so that upon contact of either of the bolts 36 or 37 with the contact element 33, the switch is actuated to stop the loom motion.

Referring to Figure 2, it will be seen that the jack sticks 11 are operatively connected to a cam member 44,

the rotation of which causes the jack sticks 11 to impart upward and downward movement to the harness frames 12 alternately. The upper ends of the harness frames 12 are connected by means of harness straps 45 which extend over the harness rolls 15 and 16 and permit one of the harness frames 12 to move upwardly while the other harness frame 12 moves downwardly.

In operation, the harness stop motion device of the present invention serves to stop the loom movement upon dropping of either of the harness frames 12 due to breakage or damage to the harness strap 45 or due to any other reason such as displacement of the harness roll shaft 14 by breakage of the heddles 25.

As seen most clearly in Figure 6, the contact element 33 totally encloses the open bottom portion of the member 26 upon engagement of the ends of the bolts 36 and 37, or either one of them, with the contact element 33, no spark is exposed to the extent that any fire hazard is created.

What is claimed is:

1. The combination with a loom frame having an arched frame, a vertically movable upstanding harness frame positioned within said arched frame and harness means operatively connecting sai harness frame to said arched frame, a harness stop motion device comprising a horizontally disposed member positioned so that a portion, is directly below said harness frame and fixedly supported oncsaid loom frame, said member including a fixed 'contactele'rnent'andspaced contact elements arranged in superimposed spaced relation with respect to said fixed contact element, said contact elements being dependingly carried by said member, spaced spring biased bolts connecting said' member to said fixed contact ele ment for'movement into and out of contacting engagement with said fixed contact element, said contact elements being electrically connectable to a stop motion switch of said loom and being movable into contacting engagement'with said fixed contact element upon breaking of the operative connection of said harness frame.

2.'The combination with a loom frame having an arched frame, a vertically movable upstanding harness frame positioned within said arched frame and harness means operatively connecting said harness frame to said arched frame, a harness stop motion device comprising an upstanding bracket positioned adjacent said harness frame and fixedly attached to said loom frame, a saddle on the upper end of said bracket, a horizontally disposed member positioned so that one end portion is directly below said harness frame and fixedly supported on said saddle, said member including a fixed contact element and spaced contact elements arranged in superimposed spaced relation with respect to said fixed contact element, said contact elements being dependingly carried by said member, spaced spring biased bolts connecting said member to said fixed contact element for movement into and out of contacting engagement with said fixed contact element, said contact elements being electrically connectable to a stop motion switch of said loom and being movable into contacting engagement with said fixed contact element upon breaking of the operative connection of said harness frame.

3. The combination with a loom frame having an arched frame, a vertically movable upstanding harness frame positioned within said arched frame and harness means operatively connecting said harness frame to said arched frame, a harness stop motion device comprising an upstanding bracket positioned adjacent said harness frame and fixedly attached to said loom frame, a saddle on the upper end of said bracket, a horizontally disposed member positioned so that an end portion is directly below said harness frame and fixedly supported on said saddle, said member including a fixed contact element and spaced contact elements arranged in superimposed spaced relation with respect to said fixed contact element, said contact elements being dependingly carried by said member, spaced spring biased bolts connecting said memher to saidfixed contact element for movement into and out of contacting engagement with said fixed contact element, said contact elements being electrically connectable to a stop motion switch of said loom and being movable into contacting engagement with said fixed contact element upon breaking of the operative connection of said harness frame.

References Cited in the file of this patent UNITED STATES PATENTS Bailey et al. May 3, 

